Knife and scissors sharpener



July 20; 1943. wENTEs v 2,324,805

KNIFE AND SCISSORS SHARPENER Filed Dec. 5, 1942 `Patented July 20, 1943UNITED* sii-#Ares lenteur Nori-fic.:E,

KNIFE Annsorssoas SHARPENER Isaac Wentes, Philadelphia, Pa.

Aapplication December 5, 1942, Serial No; 468,175 I (o1. 51--soiyClaims;

My invention relatesto .a new and useful "knife and-scissors Sharpenerand has forone. ofits objects to provide a device. of this characterthatis simplein construction.V strong and durable and exceedingly efcient.in operation.

Another object of 'this invention is` to provide a frame having twoabrasive wheels'removably mountedv therein, one of saidlwheels being.'held in a predeterminedlocation and the other spring pressed intocontact with `the first one whereby `motion will be transmitted to saidsecond one when the first one is revolved.

Another object of the present invention is to construct the frame in amanner that i the Sharpener may accommodateA either a knife or the bladeof a pair of scissors.

A furtherobject of the invention is to provide a reversible crank handleto permit the sharpening of knife and scissors blades of differentlengths without interference.

With the above and other objects in View this invention consists of thedetails of construction and combination of elements hereinafter setforth and then designated bythe claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same I will describeits construction in detail referring by numerals to the accompanyingdrawing forming a parthereof, in which:

Fig. 1 is a rear side elevation of a knife and scissors Sharpenerconstructed in accordance with my invention.

Fig. 2 is an end view thereof.

Fig. 3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is a top plan View of the same.

In carrying out my invention as herein embodied 5 is the Sharpener frameof general U-shape in cross section and including a bottom wall 6, frontand rear side walls 'I and 8, respectively, and a pair of ears 9projecting from the upper edges of both side walls and the ears of eachpair are spaced apart to provide blades receiving recesses I0.

The bottom wall 6 has apertures I I for the passage of suitablefastening devices to temporarily nx the Sharpener to a work bench orother support, and one of the side walls, as 'l'. has holes I2 wherebythe Sharpener may be attached to a bracket which is secured to asupport.

The ears El have slots I3 substantially parallel to the bottom wall andopen at their outer ends, that is, the slots of associated ears of eachpair open in opposite directions.

The main shaft I 4 and the countershaft I5 each has a" collar IiiAadjacent one end: 4Abre or other suitable relatively soft washer I'l` isplaced onthe shaft in engagement with thecollar and `then an abrasivewheel I8-I9 is" mounted on `its respective shaft. Another softorcompressible washer ZITiSplaced` against theopposite sideV of'theabrasive wheel and ii'nallyall are clamped inplaceby, va `nut 2ldscrewed onto `the shaft; The shafts 'areiplaced in 'their'respectiveslotsk inthe ears with metal washers' 22 betweenA the" collars and thenuts and the contiguous side walls or ears.

The main shaft I4 is normally retained in position in its slots by metalstraps or retaining plates 23 each of which has a hole in one end to tover an en'd of the shaft and a hole inthe opposite end to receive ascrew 24 which is threaded into a side wall to hold each plate to theframe. The retaining plates function as` bearings for the main shaftwhen the latter does not snugly t the slots.

A threaded socket 25 is carried by one end of the main shaft I4 toreceive either end of `the crank 26 having a long handle 2l and a shorthandle 28. The short handle is connected to the socket when a shortblade is to be sharpened, like that of a penknife but when a longerblade is to be sharpened the crank is reversed and the long handle is4attached to the socket.

The countershaft I5 is slidably mounted in its slots and urged towardsthe main shaft, so the abrasive wheel I9 will engage the abrasive wheelI8, by springs 29. Preferably these springs are comprised of wire andsecured to the side walls by anchoring means 3l), passing back of guidemeans 3| on the side walls and engaged in grooves in the protruding endsof the counter shaft. This arrangement causes the abrasive wheely I9 toconstantly remain in contact with the wheel I8 even as they wear away.

The upper edges of the frame sidewalls at the ends adjacent the abrasivewheel I8 are fashioned to provide inclined rests 32 at suitable anglesto cause the edge of the blade of a pairof scissors to properlycontactthe abrasive wheel I8 for sharpening said blade. During the sharpi eningoperations on a blade of a pair of scissors the abrasive wheels arerevolved and the blade is moved back and forth longitudinally with theinclined rests 32 as a guide.

In sharpening a knife, the blade is placed in the aperture Il) betweenthe two abrasive wheels and moved. back and forth while the wheels are'n revolved through the medium of the crank. The

I9 through frictional peripheral contact so the contiguous surfaces aremoving in the same direction, preferably upwardly. This action cuts awaythe necessary metal on both sides of the blade simultaneously to producea sharp edge and if the blade is inserted a sufficient distance betweenthe abrasive wheels it will be hollow ground.

Of course I do not wish to be limited to the exact details ofconstruction shown and described herein as these may be varied withinthe scope of the appended claims without departing from the spirit of myinvention.

Having described my invention what I claim as new and useful is:

1. A Sharpener comprising a frame including upstanding ears on oppositesides thereof, said ears having horizontal open-ended slots, shaftsmounted in the slots and extending cross-wise of the frame in parallelrelation, retaining plates engaging one of said shafts and attached tothe frame, a socket on that shaft which is held by the retaining plates,said socket adapted to receive either end of a crank having handles ofdifferent lengths, springs mounted on opposite sides of a frame andengaging the other shaft to urge the latter towards the shaft having thesocket thereon, and abrasive wheels clamped to said shafts with theperipheries of said wheels contacting at a location between the ears.

2. The structure in claim 1 wherein the frame is generally U-shape incross section providing a bottom wall with apertures and side Walls, oneof which has holes therein.

3. The structure in claim 1 in combination with inclined rests on theframe adjacent the abrasive Wheel on the shaft carrying the socket.

4. The structure in claim 1 wherein the shaft that is engaged by thesprings has circular grooves to prevent slipping of the springs.

5. A Sharpener consisting of a frame including a bottom wall and spacedupstanding side walls, a pair of ears projecting from the upper edge ofeach side Walls and having slots opening in opposite directions, a mainshaft mounted in the slots of oppositely located ears, means to retainsaid main shaft in position, a socket on said shaft to receive a crank,an abrasive wheel secured to said shaft, a countershaft slidably mountedin the slots of the other oppositely located ears, an abrasive wheelsecured to said countershaft, and springs anchored on the side walls ofthe frame and passing behind guides and engaging the ends of thecountershaft to urge the second abrasive wheel towards the rst wheel toretain the peripheries of said wheels in engagement.

ISAAC WENTES.

